SmcWCountEvent

Function

Sets count match event callback function.

Format

Ret = SmcWCountEvent( Id , AxisNo , CallBack , EventMode , CountType, Count , Parameter )

Parameters

Id [ C, C++: short ] [ Python: ctypes.c_short ]

Specify the device ID retrieved by SmcWInit function.

AxisNo [ C, C++: short ] [ Python: ctypes.c_short ]

Specify axis number.

CallBack [ C, C++: PSMC_COUNT_CALLBACK ] [ Python: PSMC_COUNT_CALLBACK ]

Specify the address of the callback function.
If NULL is specified, the notification setting by callback is cleared.

EventMode [ C, C++: short ] [ Python: ctypes.c_short ]

Set the event to valid/invalid.

CountType [ C, C++: short ] [ Python: ctypes.c_short ]

Set the counter that does the count agreement.

Count [ C, C++: int ] [ Python: ctypes.c_int ]

Set the number of counts.
Range : -134217728 to 134217727

Parameter [ C, C++: void * ] [ Python: ctypes.c_void_p ]

Specify the parameter address to pass to the callback.
Specify NULL if no parameter is required.

Return Value

Ret [ C, C++: long ] [ Python: ctypes.c_long ]

See also: Error code details

Remarks

When the counter value reaches the number of specified counts, the events occur.
If the event generation function is executed once, the event is generated every time the factor is generated afterwards.
It is not necessary to execute it two or more times excluding the purpose to stop the event.

When a count match occurs, notify the application through a callback.
After setting the callback, when a count match occurs, the set callback function is called.

In the SmcWSetCtrlTypeOut function, the count agreement can output the signal while the condition is consisting only as for the output signal that the counter count agreement signal setting is done.

-Therefore, the change in the level is at a very fast pulse output and there is a possibility not to be able to recognize as data in the output destination for the moment.
-The signal become like the state that the level changes when stopping by the number of specified pulses.
-One shot pulse that specifies the width of the signal cannot be output.

There are two kinds of signals as follows.

-Output pulse counter count agreement signal(CP1)
Set "0: the number of output pulses" to CountType and when the output pulse number count agreement event is effective.

-Encoder counter count agreement signal(CP2)
Set "1: the number of encoders of count pulses" to CountType and when the encoder pulse number count agreement event is effective.

Example

The count agreement event when becoming number 500 of output pulses for axis number 1 is set.

C, C++

long Ret;

Ret = SmcWCountEvent( Id , 1 , CallBack , 1 , 0 , 500 , this );

Python

Ret = ctypes.c_long()

Ret.value = csmc.SmcWCountEvent( Id , 1 , CallBack , 1 , 0 , 500 , 0 )

See Also

SmcWStopEvent SmcWBankEvent

Callback Function

Format

CallBack( Id , AxisNo , Message , Parameter )

Parameters

Id [ C, C++: short ] [ Python: ctypes.c_short ]

The ID retrieved by SmcWInit function is passed.

AxisNo [ C, C++: short ] [ Python: ctypes.c_short ]

The axis number that the event occurred is passed from the driver.

Message [ C, C++: int ] [ Python: ctypes.c_int ]

The message ID that cause the callback function to be called is passed .

Parameter [ C, C++: void * ] [ Python: ctypes.c_void_p ]

The parameter specified by the SmcWCountEvent is passed.

Return Value

None [ void ]